Turbo Dyno hp

need more info.
type of fuel,what degrees of retard
what size spacer or if you know the real comp ratios
how was the boost verified.
and you really need af
what dyno and did they load it
 
Was on 93 pump, no timing taken out, don't know the real compression ratio, it has .08" spacer.

Boost and a/f ratio was verified through a megasquirt ecu. It runs the secondaries on the bike, as well as monitors other stuff like rpm, coolant temp, pulse width, duty cycle, map, boost, and a/f. I actually forgot my laptop the day I had it dynoed so I'm only going by what was displayed that last dozen or so times I've done datalogging.

Not sure what type of dyno it was, I could find out. I do know that he wasn't loading the dyno.

Obviously the dyno is completely differen't than the street so, things may have been differen't. I really only wanted to get hp numbers on the bike. I looked at some of the other turbo graphs on this site and some were making about the same hp as me 300, with lower torque numbers, closer to 175. I just thought I should have had a higher hp reading being that my bike is a 1363, and it has a water/intercooler on it.
 
Think I'll stick w/ the stock limit of 186 mph. There is so much involved in going faster...it really is a science and I can appreciate the knowledge some of you have in this field.
 
stock cams? and what degree set at?

you can see that there is no innercooler on it
torque drops like a rock on back to back pulls.
 
Stock cams. I'd have to check what cams were set at. I have it written down in my garage. If I remember right it was 105 105. Is it not normal for torque to drop as rpm rises?

Yes the bike does have an intercooler on it. Intake temps after the intercooler rarely see 105 degrees. Usually they are below 100 degrees.

Heres a pic of the intercooler on a mock up bike and the half radiator/heat exchanger.
View attachment 1510417
View attachment 1510418
View attachment 1510419
View attachment 1510420
 
my bad I had the runs backwards.
1363 with lower compression and stock cams would be about 160 with a dump and 155 with a full pipe
so add 1.0 bar boost and you should be at 310-320 at 13.2:1 on pump gas and stock timing
boost is weird sometimes tire slipage and strapage is critical.
I would have like to see A/F with the pull. also did the room have good air to pull in?
 
The room had good ventilation. It had duct work pulling air from the outside blowing the front of the bike, must have been a 1.5 ft pipe. It was very windy I would say.

Since I wasn't data logging my bike on the dyno I can't say for sure what the A/F was. I still cant believe I forgot my laptop that day.:banghead: I do know that it was about 11.5-12 at the most under pressure in multiple datalogs. I had never had the bike on a dyno so I didn't want to take any chances running too lean and burning up my motor, so I would guess that there is definitely room for improvement in tuning.

Is there a rule of thumb for how much power is given up when fuel is added? I would guess every bike and motor is different.

I do know that we tried the bike in 5th gear for a couple of runs but the bike kept breaking the tire loose. Then we went to 6th gear, it helped a little.

On another site, a buddy of mine said try letting air out of the tire then strapping the bike, then put the air back in to really get it tight. Unfortunately the guy who was dynoing the bike hadn't had a bike like mine on their dyno before. Have any tricks for strapping a bike.

I think I'm going to check my clutch stack height on my bike. Maybe my clutch needs to be rebuilt. This may sound crazy but I'm running the stock clutch on my bike, it has about 20k on it, with heavy duty clutch springs. I've been told stick with OEM plates so thats what I'll go with.

Thanks for the replies, maybe I'll take a trip down to Texas this winter and take a break from the cold. Oh, on a side note, are there any guys running PC's with secondaries, to adjust fueling under boost?
 
if the tire was breaking loose in 5th your runs don't count.
as for running secondaries wit the pC3 I don't know but you:goodidea: can run primaries and compensate for boost
 
So it is your opinion that if it was breaking loose in 5th, it was in 6th gear also? If that has been your experience then I'll take your word for it. Guess I'll have to get it strapped down better next time.
 
Last edited:
By the looks of your intercooler core configuration there is a very good chance that you are choking the turbo, that is why your torque is so high. Those intercoolers may be able to cool the charge but they do not allow enough airflow in the current configuration, therfore choking back your charge air.

Richard
 
I think your a little confused about the pic I posted. That was a picture of the side view. Not sure if your familiar with them but those are laminova intercooler cores. They use them in a lot of automotive and racing applications. Being who you are I'm sure you've heard of them, if not google is your friend. That picture was the side view of plenum were the liquid travels through the core.

Heres a pic of the underside of the setup.
Intercooler6.jpg

Intercooler5.jpg
 
No confusion here, I beleive I understand the liq/air system on a busa. Seeing as we were the one of the first if not the very first to design the liq/air setup that used a recirculating system on the busa, and we have improved on it greatly since the beginning, so yes I do understand where the water and airflows, it is a copy of what we designed about 4 years ago.

I know very well were the water flows and where the charge air flows, and I am quite familiar with laminova cores and how they need to be configured to work properly.

Yours is choking the charge air, it should be fine with low boost, but as you increase the boost you will begin to start losing psi due to a pressure differential through the core configuration you are using. There is a little more to intercooling then just installing the parts where you can make them fit. The small turbo you are using, (if it is a standard GT28R) will be out of breathe at 300hp, and with the core configuration you are pushing the charge air through it is seriously choked.

Richard
 
Last edited:
You must log in or register to reply here.

Similar threads

C
dyno reading
Replies
5
Views
1,235
Got-Busa?
Got-Busa?
delboy
Ping.Johnny Cheese.......
Replies
4
Views
1,243
delboy
delboy
godzilla
Dyno runs big-bore GEN1 wanted
Replies
2
Views
1,279
GPW
G
Sewman
Dyno HP
Replies
14
Views
1,233
MetalDisorder
MetalDisorder
MidnightBusainSD
RCC Stage 1 Turbo With 240 wheel
2
Replies
23
Views
7,828
Spkrdctr
S
Back
Top